I have not been able to resolve this. I have an internal VWIC-2MFT in my Cisco 2621. I've confirmed with AT&T that it should be setup as framing = esf, linecode = b8zs, and channels = timeslots 1-4, LMI = ANSI I've tried both T1 ports on the VWIC to no avail (cable is currently plugged into T1 0/1) as well as Cisco and ANSI LMI. When I do a show frame-relay lmi, my router is sending lmi but not receiving anything back. AT&T reported that they are receiving signaling errors from my router? She couldn't elaborate but when I put the Router/VWIC in loopback mode, she was able to loop through my router/DSU so the plumbing appears to be clear but something is not right with the signal to/from their switch. Please see the config below (names/passwords have been changed to protect the innocent! :) Regardless of all PVC, IP config settings, shouldn't I at the very minimum get LMI responses as long as the CSU is configured correctly and talking to their switch? The serial 0/0:0 is showing up, line protocol down (looped) I did a search on this condition and it says that "looped" could be caused by almost anything? I did perform a no loopback on s0 an controller t1 Any ideas on why I cannot get an LMI response? --- show config Using 1277 out of 29688 bytes ! version 12.0 service config service timestamps debug uptime service timestamps log uptime service password-encryption ! hostname ATL ! enable secret enable password ! ! ! ! ! ip subnet-zero ! isdn voice-call-failure 0 ! ! controller T1 0/0 shutdown framing esf linecode b8zs channel-group 0 timeslots 1-4 ! controller T1 0/1 framing esf linecode b8zs channel-group 0 timeslots 1-4 ! ! ! ! interface Ethernet0/0 ip address x.x.x.x 255.255.255.0 no ip directed-broadcast no cdp enable ! interface Serial0/0:0 description Frame Relay to Cali bandwidth 256 no ip address no ip directed-broadcast encapsulation frame-relay IETF ip mroute-cache fair-queue 64 256 0 frame-relay interface-dlci 260 frame-relay lmi-type ansi ! interface Ethernet0/1 no ip address no ip directed-broadcast shutdown no cdp enable ! interface Serial0/1:0 no ip address no ip directed-broadcast fair-queue 64 256 0 ! ip classless ip http server ! dialer-list 1 protocol ip permit dialer-list 1 protocol ipx permit no cdp run ! line con 0 exec-timeout 0 0 password login transport input none line aux 0 line vty 0 4 password 7 login ! no scheduler allocate end

You don't get LMI from a correctly configured CSU. LMI comes from your FRAD - frame relay device (in this case your wic), and the Frame Relay switch at AT&T. The CSU is only responsible for the T1 transmission. The frame relay networking is between the frad and the fr switch. Sounds like they did a loop test, and that checks (make sure they cleared that sucker). Could do a BERT but it will probably come back clean. Here's what I suspect. And forgive me, my frame relay is a little rusty (been doing more vpn these days), but the LMI comes from the choice of Frame Realy. There is ANSI-ANNEX-A ( I know very little about, never used it in the states), ANSI-ANNEX-D which LMI is transmitted on DLCI 0, and Cisco's LMI which is transmitted on DLCI 1024. Now if your LMI is on DLCI 1024 and there LMI is on DLCI 0, you get the exact description of what you are seeing. Ask AT&T if they can change the LMI with you on the fly. I ran into a lot of carrier that set the crap to AUTO (auto detect) - it rarely work. Tell them to manually set it to LMI, see if it comes up, then tell them to manually set it to ANNEX-D, and see if it comes up. And if all else fells, tell them to bring the circuit down and back up. You'd be amazed at how often a "cleared while testing" resolves things. D